Improvement in type-casting machines



UNITED STATES PATENT OFFICEo JOHN I. srUEGIs, OE NEW YORK, N. Y.

IMPROVEMENT IN TYPE-CASTING MACHINES.`

Specification forming part of Letters Patent No.6,2/13, dated March 27,1849; antcdatcd September 27, 1848.

To all whom it may concern:

Be it known that I, JOHN I. SrURers, of the city, county, and State ofNew York, have invented a new and useful Improvement in Type- CastingMachines; and I do hereby declare the following to be a full descriptionofthe same.

The nature of myinvention consists in combining with the nipple of atype-casting machine a conical plug or piston valve, which plug-valve,by means of an arrangement of levers attached to the frameof the machineand connected with the plugstem and a cam on the driving-shaft,workswithin a chamberbox forming the back part of the nipple on the inside ofthe bath,

To describe more particularly my invention I will refer to theaccompanying drawings.

v Figures 1, 2, 3, and 4 are several views of a type-casting machinehaving the matrix removed as immaterial to the showing ofmyinvention,the same letters, wherever they Occur, having reference tothe same parts.

Letters A A, &c., are the bottom board or plate and frame of atype-casting machine; B B, Src., the type-metal batharranged between theparts of the frame, underneath which the furnace is placed for fusingthe metal. In the bath is a well, C C, Src., into which a plunger, D D,works by means of a cam-wheel, E E, on the driving-shaft F, and thelevers G and H, as connected together by the rod I, and the spiralspring J, underneath the lever G, for reacting the levers and plungerand ejecting the metal through the canal K and nipplevent t0 the matrixwhen the conical plug or piston valve L has been withdrawn from it. Thisconical plug or piston-valve is about one inch long, (though it may bemade of any required form and size,) and is made to work inside thenipple-chamber formed within the metal bath by combining the chamberboxM with or against the inner side of the bath and the back end of thenipple N. At the lower side of the nipple-chamber is a passage-way orduct, K, leading to the well, and at the back of the chamber anotherpassage-way for the stem of the conical plug to pass through and for theadmission of the fused type-metal for charging the well. This opening isa little larger than the stem of the plug, but not as large as the headof the conical plug; therefore when the plug is drawn back from the ventOf the nipple, so as to allow the ejectment Of the metal from the wellto the matrix, it forms a seat on ythe passageway and completely cutsoff all ingress of metal to the chamber until the charge from the wellhas been expelled. To work this conical plug-valve L the stem of itextends beyond the chamber-box and connects to a pin, P, in the end of alever, O. This lever is secured by a screw, R, (as a working center,)tothe top ofthe frame of the machine, having its outer end connected(through a slot) to the upper end of a U `shaped lever, S, which isfastened to the side of the machine-frame by a screw, S, as a center orfulcrum, and by means of a cam, T, on the driving-shaft E, its lower endis raised or depressed by the revolving of the cam, so as to cause avibratory motion of the upper end of the lever, and also of the end ofthe lever O, connected therewith, for the purpose of alternating themotion of the plug-valve within the nipple-chamber and cutting of theingress and egress of the fused type-metal.

U is a spiral spring attached to the lower side of the lever S and thebottom or plate piece of the machine, for the purpose of reacting thelever after being raised by the cam T, for the purpose of drawing baci;theplug-valve from the vent of the nipple.

W is a support and guide-piece against the side of the machine forsupporting the lever` S and guiding the lever G.

X is a crank on the end of the driving-shaft, and Y Y the driving-shaftsupporters or rests.

The operation of these several parts, when the machine is putin motion,is that when the cam Edepresses the end of the lever G it acts on theend of the lever H, through the rod I, and causes that to be depressedalso, and lifting at its opposite end the plunger D, while at the sametime the cam T lifts the lower end ofthe lever S, throwing its upper endback, and the end of the lever O, connected therewith, correspondingly,to open the back passage-way of `the nipple-chamber for the ingressofthe metal and to close the vent of the nipple. Vhen in this positionthe metal flows into the chamber and through the duct K to the well, atwhich time (when the well is charged) the cams have passed their highestpoints and the plug is drawn back from the nipple-vent by the action ofthe spiral spring U, and closes the i11- tion with the nipple and bathand well of a type-casting machine, substantially in the manner and forthe purposes herein set forth.

2. In combination with the conical plug L, the arrangement of the leversO and S and cam T, substantially in the manner and for the purposesherein set forth.

JOHN I. S'IURGIS.

Witnesses:

CHARLEsL. BARRITT, JOHN HANDEL, Jr.

